It has to be between the strings and the charge controller, so measure the current on each string in full sun. That will isolate which is not performing. Also, look at your DC output in full sun, your MX80 should show the KWp and it should match or exceed your system wattage. <br>
<br><div class="gmail_quote">On Sun, Apr 8, 2012 at 10:43 PM, Bob Clark <span dir="ltr"><<a href="mailto:bclark@solar-wind.us">bclark@solar-wind.us</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div lang="EN-US" link="blue" vlink="purple"><div><p class="MsoNormal">Dear Wrenches:<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">What am I not seeing with this situation?<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Only 133 DCkWH (120 ACkWH) during mid-December through April 6 (at least that is what the mate and the MX80 CC say). PVWATTS predicted ~600 ACkWH.<br><br>Here are the major components of the system:<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">24 - Silicon Energy 190W solar modules in 8 series of 3 modules for 4560W nominal<u></u><u></u></p><p class="MsoNormal">1 - Midnite Solar, Combiner box, MNPV12 with 8 circuit breakers (one for each string)<u></u><u></u></p>
<p class="MsoNormal">1 - MX80 charge controller<u></u><u></u></p><p class="MsoNormal">16 - Concorde SunXtender Sealed AGM Battery, 6V, 405Ah, L16, PVX-4050HT (2 parallel series of 8 batteries for 48V and 810 AH)<u></u><u></u></p>
<p class="MsoNormal">1 - Outback FlexNet DC System Monitor, FN-DC<u></u><u></u></p><p class="MsoNormal">2 - GVFX3648 inverters<u></u><u></u></p><p class="MsoNormal">1 - Mate2<u></u><u></u></p><p class="MsoNormal">1 - HUB10<u></u><u></u></p>
<p class="MsoNormal">1 - Remote Temperature Sensor<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">The insolation this winter has been, if anything, more than usual. The electrical usage noted on the utility bill was approximately 170 ACkWH more than the same winter period last winter. No appreciable change in usage pattern this winter compared to last winter (in fact, if anything, there has been less use this winter). Everything appears to be functioning (normally, I think).<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">What is going on? It cannot just be a malfunctioning utility meter. It seems to me that regardless of the functionality of the utility meter, the Mate and the MX80 should show greater production.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">What is being overlooked?<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Thanks for your help.<u></u><u></u></p><p class="MsoNormal">
<u></u> <u></u></p><p class="MsoNormal"><b><span style="font-family:Papyrus;color:#e36c0a">Bob Clark<u></u><u></u></span></b></p><p class="MsoNormal"><b><i><span style="font-family:Papyrus;color:#e36c0a">SolarWind Energy Systems, LLC<u></u><u></u></span></i></b></p>
<p class="MsoNormal"><b><span style="font-family:Papyrus;color:#e36c0a"> <a href="tel:%28509%29%20826-1259" value="+15098261259" target="_blank">(509) 826-1259</a><u></u><u></u></span></b></p></div></div><br>_______________________________________________<br>
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